OBEXServerSessionImpl.java - bluecove - Java library for Bluetooth

Source path: svn/ trunk/ bluecove/ src/ main/ java/ com/ intel/ bluetooth/ obex/ OBEXServerSessionImpl.java

‹r2643

r3067

/**
 *  BlueCove - Java library for Bluetooth
 *  Copyright (C) 2007-2009 Vlad Skarzhevskyy
 *
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 *
 *  @author vlads
 *  @version $Id$
 */
package com.intel.bluetooth.obex;

import java.io.EOFException;
import java.io.IOException;

import javax.microedition.io.StreamConnection;
import javax.obex.Authenticator;
import javax.obex.ResponseCodes;
import javax.obex.ServerRequestHandler;

import com.intel.bluetooth.BlueCoveImpl;
import com.intel.bluetooth.BluetoothServerConnection;
import com.intel.bluetooth.DebugLog;
import com.intel.bluetooth.UtilsJavaSE;

class OBEXServerSessionImpl extends OBEXSessionBase implements Runnable, BluetoothServerConnection {

	private ServerRequestHandler handler;

	private OBEXServerOperation operation;

	private boolean closeRequested = false;

	private volatile boolean delayClose = false;

	private Object canCloseEvent = new Object();

	private Object stackID;

	private Thread handlerThread;

	private static int threadNumber;

	private static synchronized int nextThreadNum() {
		return threadNumber++;
	}

	static int errorCount = 0;

	OBEXServerSessionImpl(StreamConnection connection, ServerRequestHandler handler, Authenticator authenticator,
			OBEXConnectionParams obexConnectionParams) throws IOException {
		super(connection, obexConnectionParams);
		this.requestSent = true;
		this.handler = handler;
		this.authenticator = authenticator;
		stackID = BlueCoveImpl.getCurrentThreadBluetoothStackID();
		handlerThread = new Thread(this, "OBEXServerSessionThread-" + nextThreadNum());
		UtilsJavaSE.threadSetDaemon(handlerThread);
	}

	void startSessionHandlerThread() {
		handlerThread.start();
	}

	public void run() {
		// Let the acceptAndOpen return to the caller.
		Thread.yield();
		try {
			if (stackID != null) {
				BlueCoveImpl.setThreadBluetoothStackID(stackID);
			}
			while (!isClosed() && !closeRequested) {
				if (!handleRequest()) {
					return;
				}
			}
		} catch (Throwable e) {
			synchronized (OBEXServerSessionImpl.class) {
				errorCount++;
			}
			if (this.isConnected) {
				DebugLog.error("OBEXServerSession error", e);
			} else {
				DebugLog.debug("OBEXServerSession error", e);
			}
		} finally {
			DebugLog.debug("OBEXServerSession ends");
			try {
				super.close();
			} catch (IOException e) {
				DebugLog.debug("OBEXServerSession close error", e);
			}
		}
	}

	public void close() throws IOException {
		closeRequested = true;
		while (delayClose) {
			synchronized (canCloseEvent) {
				try {
					if (delayClose) {
						canCloseEvent.wait(700);
					}
				} catch (InterruptedException e) {
				}
				delayClose = false;
			}
		}
		if (!isClosed()) {
			DebugLog.debug("OBEXServerSession close");
			// (new Throwable()).printStackTrace();
			if (operation != null) {
				operation.close();
				operation = null;
			}
		}
		super.close();
	}

	private boolean handleRequest() throws IOException {
		DebugLog.debug("OBEXServerSession handleRequest");
		delayClose = false;
		byte[] b;
		try {
			b = readPacket();
		} catch (EOFException e) {
			if (isConnected) {
				throw e;
			}
			DebugLog.debug("OBEXServerSession got EOF");
			close();
			return false;
		}
		delayClose = true;
		try {
			int opcode = b[0] & 0xFF;
			boolean finalPacket = ((opcode & OBEXOperationCodes.FINAL_BIT) != 0);
			if (finalPacket) {
				DebugLog.debug("OBEXServerSession got operation finalPacket");
			}
			switch (opcode) {
			case OBEXOperationCodes.CONNECT:
				processConnect(b);
				break;
			case OBEXOperationCodes.DISCONNECT:
				processDisconnect(b);
				break;
			case OBEXOperationCodes.PUT_FINAL:
			case OBEXOperationCodes.PUT:
				processPut(b, finalPacket);
				break;
			case OBEXOperationCodes.SETPATH | OBEXOperationCodes.FINAL_BIT:
			case OBEXOperationCodes.SETPATH:
				processSetPath(b, finalPacket);
				break;
			case OBEXOperationCodes.ABORT:
				processAbort();
				break;
			case OBEXOperationCodes.GET_FINAL:
			case OBEXOperationCodes.GET:
				processGet(b, finalPacket);
				break;
			default:
				writePacket(ResponseCodes.OBEX_HTTP_NOT_IMPLEMENTED, null);
			}
		} finally {
			delayClose = false;
		}
		synchronized (canCloseEvent) {
			canCloseEvent.notifyAll();
		}
		return true;
	}

	private void processConnect(byte[] b) throws IOException {
		DebugLog.debug("Connect operation");
		if (b[3] != OBEXOperationCodes.OBEX_VERSION) {
			throw new IOException("Unsupported client OBEX version " + b[3]);
		}
		if (b.length < 7) {
			throw new IOException("Corrupted OBEX data");
		}
		int requestedMTU = OBEXUtils.bytesToShort(b[5], b[6]);
		if (requestedMTU < OBEXOperationCodes.OBEX_MINIMUM_MTU) {
			throw new IOException("Invalid MTU " + requestedMTU);
		}
		this.mtu = requestedMTU;
		DebugLog.debug("mtu selected", this.mtu);

		int rc;
		OBEXHeaderSetImpl replyHeaders = createOBEXHeaderSetImpl();
		OBEXHeaderSetImpl requestHeaders = OBEXHeaderSetImpl.readHeaders(b, 7);
		if (!handleAuthenticationResponse(requestHeaders)) {
			rc = ResponseCodes.OBEX_HTTP_UNAUTHORIZED;
		} else {
			handleAuthenticationChallenge(requestHeaders, (OBEXHeaderSetImpl) replyHeaders);
			rc = ResponseCodes.OBEX_HTTP_INTERNAL_ERROR;
			try {
				rc = handler.onConnect(requestHeaders, replyHeaders);
			} catch (Throwable e) {
				DebugLog.error("onConnect", e);
			}
		}
		byte[] connectResponse = new byte[4];
		connectResponse[0] = OBEXOperationCodes.OBEX_VERSION;
		connectResponse[1] = 0; /* Flags */
		connectResponse[2] = OBEXUtils.hiByte(obexConnectionParams.mtu);
		connectResponse[3] = OBEXUtils.loByte(obexConnectionParams.mtu);
		writePacketWithFlags(rc, connectResponse, replyHeaders);
		if (rc == ResponseCodes.OBEX_HTTP_OK) {
			this.isConnected = true;
		}
	}

	boolean handleAuthenticationResponse(OBEXHeaderSetImpl incomingHeaders) throws IOException {
		return handleAuthenticationResponse(incomingHeaders, handler);
	}

	private boolean validateConnection() throws IOException {
		if (this.isConnected) {
			return true;
		}
		writePacket(ResponseCodes.OBEX_HTTP_BAD_REQUEST, null);
		return false;
	}

	private void processDisconnect(byte[] b) throws IOException {
		DebugLog.debug("Disconnect operation");
		if (!validateConnection()) {
			return;
		}
		OBEXHeaderSetImpl requestHeaders = OBEXHeaderSetImpl.readHeaders(b, 3);
		OBEXHeaderSetImpl replyHeaders = createOBEXHeaderSetImpl();
		int rc = ResponseCodes.OBEX_HTTP_OK;
		try {
			handler.onDisconnect(requestHeaders, replyHeaders);
		} catch (Throwable e) {
			rc = ResponseCodes.OBEX_HTTP_UNAVAILABLE;
			DebugLog.error("onDisconnect", e);
		}
		this.isConnected = false;
		writePacket(rc, replyHeaders);
	}

	private void processDelete(OBEXHeaderSetImpl requestHeaders) throws IOException {
		DebugLog.debug("Delete operation");
		OBEXHeaderSetImpl replyHeaders = createOBEXHeaderSetImpl();
		handleAuthenticationChallenge(requestHeaders, replyHeaders);
		int rc = ResponseCodes.OBEX_HTTP_OK;
		try {
			rc = handler.onDelete(requestHeaders, replyHeaders);
		} catch (Throwable e) {
			rc = ResponseCodes.OBEX_HTTP_UNAVAILABLE;
			DebugLog.error("onDelete", e);
		}
		writePacket(rc, replyHeaders);
	}

	private void processPut(byte[] b, boolean finalPacket) throws IOException {
		DebugLog.debug("Put/Delete operation");
		if (!validateConnection()) {
			return;
		}
		OBEXHeaderSetImpl requestHeaders = OBEXHeaderSetImpl.readHeaders(b, 3);
		// OFF; Not tested in TCK.
		// while ((!finalPacket) && (!operation.isIncommingDataReceived())) {
		// finalPacket = operation.exchangeRequestPhasePackets();
		// }
		// if (operation.isErrorReceived()) {
		// return;
		// }

		// If Client re-send the command packet with an Authenticate Response
		if (!handleAuthenticationResponse(requestHeaders, handler)) {
			writePacket(ResponseCodes.OBEX_HTTP_UNAUTHORIZED, null);
			return;
		}
		// A PUT operation with NO Body or End-of-Body headers whatsoever should
		// be treated as a delete request.
		if (finalPacket && (!requestHeaders.hasIncommingData())) {
			processDelete(requestHeaders);
			return;
		}
		DebugLog.debug("Put operation");
		operation = new OBEXServerOperationPut(this, requestHeaders, finalPacket);
		try {
			int rc = ResponseCodes.OBEX_HTTP_OK;
			try {
				rc = handler.onPut(operation);
			} catch (Throwable e) {
				rc = ResponseCodes.OBEX_HTTP_UNAVAILABLE;
				DebugLog.error("onPut", e);
			}
			if (!operation.isAborted) {
				operation.writeResponse(rc);
			}
		} finally {
			operation.close();
			operation = null;
		}
	}

	private void processGet(byte[] b, boolean finalPacket) throws IOException {
		DebugLog.debug("Get operation");
		if (!validateConnection()) {
			return;
		}
		OBEXHeaderSetImpl requestHeaders = OBEXHeaderSetImpl.readHeaders(b, 3);
		// If Client re-send the command packet with an Authenticate Response
		if (!handleAuthenticationResponse(requestHeaders, handler)) {
			writePacket(ResponseCodes.OBEX_HTTP_UNAUTHORIZED, null);
			return;
		}

		operation = new OBEXServerOperationGet(this, requestHeaders, finalPacket);

		// OFF; Not tested in TCK
		// while ((!finalPacket) && (!operation.isIncommingDataReceived())) {
		// finalPacket = operation.exchangeRequestPhasePackets();
		// }
		// if (operation.isErrorReceived()) {
		// return;
		// }
		try {
			int rc = ResponseCodes.OBEX_HTTP_OK;
			try {
				rc = handler.onGet(operation);
			} catch (Throwable e) {
				rc = ResponseCodes.OBEX_HTTP_UNAVAILABLE;
				DebugLog.error("onGet", e);
			}
			if (!operation.isAborted) {
				operation.writeResponse(rc);
			}
		} finally {
			operation.close();
			operation = null;
		}
	}

	private void processAbort() throws IOException {
		DebugLog.debug("Abort operation");
		if (!validateConnection()) {
			return;
		}
		if (operation != null) {
			operation.isAborted = true;
			operation.close();
			operation = null;
			writePacket(OBEXOperationCodes.OBEX_RESPONSE_SUCCESS, null);
		} else {
			writePacket(ResponseCodes.OBEX_HTTP_BAD_REQUEST, null);
		}
	}

	private void processSetPath(byte[] b, boolean finalPacket) throws IOException {
		DebugLog.debug("SetPath operation");
		if (!validateConnection()) {
			return;
		}
		if (b.length < 5) {
			throw new IOException("Corrupted OBEX data");
		}
		OBEXHeaderSetImpl requestHeaders = OBEXHeaderSetImpl.readHeaders(b, 5);
		// DebugLog.debug("setPath b[3]", b[3]);
		// b[4] = (byte) ((backup?1:0) | (create?0:2));
		boolean backup = ((b[3] & 1) != 0);
		boolean create = ((b[3] & 2) == 0);
		DebugLog.debug("setPath backup", backup);
		DebugLog.debug("setPath create", create);

		if (!handleAuthenticationResponse(requestHeaders, handler)) {
			writePacket(ResponseCodes.OBEX_HTTP_UNAUTHORIZED, null);
			return;
		}

		OBEXHeaderSetImpl replyHeaders = createOBEXHeaderSetImpl();
		handleAuthenticationChallenge(requestHeaders, replyHeaders);
		int rc = ResponseCodes.OBEX_HTTP_OK;
		try {
			rc = handler.onSetPath(requestHeaders, replyHeaders, backup, create);
		} catch (Throwable e) {
			rc = ResponseCodes.OBEX_HTTP_UNAVAILABLE;
			DebugLog.error("onSetPath", e);
		}
		writePacket(rc, replyHeaders);
	}

}

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Change log

r2915 by skarzhevskyy on Mar 13, 2009 Diff

Updated javadocs and Copyright

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Older revisions

r2643 by skarzhevskyy on Dec 22, 2008 Diff

Server to handle authentication
challenge in all Operations

r2641 by skarzhevskyy on Dec 22, 2008 Diff

Fixed client side handling of
Authentication Challenge, will retry
sending headers

r2640 by skarzhevskyy on Dec 22, 2008 Diff

change internal writePacket function
to accept headers

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